Daily Sunspot Evaluation
Observation Sheet Thursday, 11 October 1951
There is no typed record for this day. The values below were read by computer from the table on the sheet; when in doubt, see the drawing. Details →
- Number of groups (g)
- 6
- Number of spots (f)
- 31
- Relative number (R)
- 91
- Observer
- WG
- Reading
- all checks consistent
- File
- 19511011.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | J – 1 | 0.94 | 107 | |
| 2 | C – 11 | 0.63 | 110 | |
| 3 | H – 13 | 0.7 | 140 | |
| 4 | A – 1 | 0.28 | 227 | |
| 5 | A – 4 | 0.44 | 281 | |
| 6 | J – 1 | 0.88 | 287 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.